circuitdigest

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ESP32 Thermal Printer - Print Invoice, Receipts, Barcode, QR code, Images

Learn how to interface an ESP32 with a thermal printer using UART communication.

This tutorial provides wiring diagrams and Arduino-compatible code to print text, images, barcodes, and QR codes via the ESP32.

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How to boot Raspberry Pi from USB without SD card

Discover how to enable USB boot on Raspberry Pi models, including Pi 3B, 3B+, Pi 4, and Pi 5.

This complete guide walks you through EEPROM updates, configuration steps, and performance benefits of USB-based booting for improved speed and reliability.

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SR Latch Tutorial

Understand SR latch circuits with this easy guide. Learn how Set and Reset inputs control the output, explore the truth table, and see the logic diagram using NAND gates. Perfect for electronics beginners.

SR Latch Tutorial

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Raspberry Pi-Based SMS Alert System

Build a Raspberry Pi-Based SMS Alert System for temperature and humidity alert using a DHT11 sensor and CircuitDigest Cloud SMS API.

Receive real-time alerts via Wi‑Fi, no GSM hardware needed. Includes setup guidance, sensor wiring, and code implementation.

Ideal for beginners and makers exploring IoT automation, home monitoring, and simple SMS-based safety systems.

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GT-U16 RTK L1/L5 Module with Arduino

Learn how to interface and parse GNSS data from the Goouuu Tech GT-U16 RTK L1/L5 module using Arduino.

This tutorial demonstrates real-time satellite tracking, UART communication, and accurate GPS positioning.

Ideal for developers working on high-precision navigation, drone mapping, surveying tools, and other RTK-based geolocation projects.

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I Thought I Knew How to Set a Static IP on Raspberry Pi Until It Didn't Work

Tired of losing track of your Raspberry Pi on the network?

This guide shows how to assign a static IP on Raspberry Pi using the nmcli tool with NetworkManager on Raspberry Pi OS Bookworm.

Ideal for SSH access, local servers, and IoT projects.

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Build a GPS Tracker using Arduino Uno, SIM800L, and Neo-6 M GPS Module

Learn how to build a GPS tracker using Arduino UNO, SIM800L GSM module, and NEO-6M GPS module.

This DIY project guides you through real-time location tracking and SMS-based updates, ideal for IoT, vehicle monitoring, or asset tracking applications.

Perfect for makers looking to combine GPS and GSM modules in a simple, low-cost Arduino setup.

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TMC2209 Stepper Motor Driver with Arduino UNO

Learn how to interface the TMC2209 stepper motor driver with Arduino UNO for precise direction and stepping control.

This beginner-friendly guide explains wiring, configuration, and example Arduino code.

Ideal for makers and engineers building 3D printers, CNC machines, or robotics projects needing silent operation and smooth motion control using UART-enabled stepper drivers.

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Interfacing the A7672S 4G LTE GNSS Module with Arduino

Learn how to use the A7672S 4G LTE GNSS module with Arduino for real-time GPS tracking and cellular communication.

This complete guide covers AT commands, circuit diagrams, and integration tips, ideal for building IoT projects like smart vehicles, GPS trackers, and remote monitoring systems with reliable 4G connectivity and GNSS support.

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Types of Transformers and Their Applications

Explore various transformer types and their key applications in electrical and electronic systems. Understand how step-up, step-down, isolation, and special-purpose transformers function across industries.

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Best GPS & GSM Modules for Arduino / IoT Projects

Choosing the best GSM/GPS Module can be tricky. This quick comparison guide breaks down top modules like SIM800L, A9G, and NEO-6M, helping you decide what fits your next IoT build.

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DIY Gas Leakage Detector

This DIY Arduino-based gas leakage detector uses the MQ-5 sensor to identify flammable gas or smoke. It triggers a buzzer and LED alert when gas concentration crosses a set threshold.

Ideal for building low-cost safety systems at home, labs, or workshops, this project helps beginners learn how to integrate sensors for real-time environmental monitoring and alerts.

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RFID based attendance system using Arduino

Build a smart RFID-based attendance system using Arduino and the RC522 module. Easily track and manage entries with RFID tags—ideal for schools, offices, and events!

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Cycloconverter in Power Electronics

Learn how cycloconverters change AC frequency to control motor speed in real-world industrial systems.

This beginner-friendly tutorial breaks down the types, working, and key circuits, complete with visuals and applications.

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DIY Water Level Indicator & Alarm Circuit

Build a simple water level indicator project that alerts you when the tank is full or low using basic electronic components like transistors and LEDs.

No microcontroller needed, perfect for beginner electronics and home maintenance enthusiasts.

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Resistor Color Code Calculator – 4, 5, & 6 Bands

Easily decode resistor values with this resistor color code calculator. Just select the band colors and instantly get the resistance, tolerance, and temperature coefficient. A must-have tool for electronics enthusiasts and circuit designers.

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Build a 3D‑Printed Mini‑Drone Test Rig

Learn how to safely test mini‑drones with this DIY 3D‑printed rig. It features a tabletop gimbal that lets your drone rotate freely without risk of crashes or prop damage, perfect for tuning flight performance and diagnosing issues at home!